Barry Levinson and Tom Fontana, whose TV credits extend back to NBC’s “Homicide: Life on the Street” and HBO’s “Oz,” have been signed by the National Geographic Channel to do a miniseries on the last days of the American Embassy in Saigon.

After more than decade of leading radio station WTMD (89.7 FM), General Manager Stephen Yasko is out, according to Steve Reeves, chairman of the board of Towson University Public Media, which operates WTMD under contract with the University.